package com.self.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.self.reggie.common.BaseContext;
import com.self.reggie.common.CustomException;
import com.self.reggie.entity.*;
import com.self.reggie.mapper.OrdersMapper;
import com.self.reggie.service.*;
import net.sf.jsqlparser.util.deparser.OrderByDeParser;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders> implements OrdersService {
    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private AddressBookService addressBookService;
    @Autowired
    private UserService userService;
    @Autowired
    private OrderDetailService orderDetailService;

    @Override
    public void submit(Orders orders) {
        //获取用户信息
        Long userId = BaseContext.getCurrentId();

        //根据用户ID获取购物车信息
        LambdaQueryWrapper<ShoppingCart> queryWrapper=new LambdaQueryWrapper<>();
        queryWrapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(queryWrapper);

        if (shoppingCarts==null||shoppingCarts.size()==0){
            throw new CustomException("购物车为空,不能下单");
        }

        //判断地址信息是否为空
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);

        if (addressBook==null){
            throw new CustomException("地址为空,不能下单");
        }

        long orderId = IdWorker.getId();//自己定义生成订单号
        AtomicInteger amount=new AtomicInteger(0);//总金额
        User user = userService.getById(userId);


        //存入订单表
            //因为前端页面只封装了Orders表的三个属性,其余属性需要自行赋值
            orders.setId(orderId);
            orders.setOrderTime(LocalDateTime.now());
            orders.setCheckoutTime(LocalDateTime.now());
            orders.setStatus(2);
            orders.setAmount(new BigDecimal(amount.get()));//总金额
            orders.setUserId(userId);
            orders.setNumber(String.valueOf(orderId));
            orders.setUserName(user.getName());
            orders.setConsignee(addressBook.getConsignee());
            orders.setPhone(addressBook.getPhone());
            orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                    + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                    + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                    + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));

        this.save(orders);


        //存入订单明细表
            //创建一个订单明细表对象,循环将购物车中信息拷贝进去
            List<OrderDetail> orderDetails=shoppingCarts.stream().map((item)->{
                OrderDetail orderDetail = new OrderDetail();
                orderDetail.setOrderId(orderId);
                orderDetail.setNumber(item.getNumber());
                orderDetail.setDishFlavor(item.getDishFlavor());
                orderDetail.setDishId(item.getDishId());
                orderDetail.setSetmealId(item.getSetmealId());
                orderDetail.setName(item.getName());
                orderDetail.setImage(item.getImage());
                orderDetail.setAmount(item.getAmount());
                amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
                return orderDetail;
            }).collect(Collectors.toList());

        orderDetailService.saveBatch(orderDetails);

        //清空购物车信息
        shoppingCartService.remove(queryWrapper);

    }
}
